Collection: Pins - Ball Lock - Marine Style - Recessed Head

Pins (With Images)

Ball Lock

Marine Style

Half Ring
Recessed Head

11 Products in this selection

Quick release. Provide positive locking for all types of applications and equipment. Body, head and all internal components are made from corrosion resistant stainless steel.
Positive lock detent pins.
303 Stainless shanks and heads
300 Grade Stainless Components
440C Stainless Balls

Additional resources:
Master Pins Catalogue PDF
Flanged Receptacles for Ball Lock Pins

A more concise listing may be found on the Smallparts store at Pins - Ball Lock - Marine Style - Recessed Head. Smallparts promote the most popular MBA products.

Nominal Diameter	Grip Length (B)	Pin Material Grade	Locking Ball to End (C )	Open Ball Distance (B)
Nominal Diameter 4.76 mm	Grip Length (B) 25.40 mm	Pin Material Grade 304 Stainless Steel	Locking Ball to End (C ) 6.60 mm	Open Ball Distance (B) 5.59 mm
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80
Part Number: BLP-048-0254-MRE-S4 Ball Lock Pins - 4.76x25.4 mm - 304 Stainless Steel Out of Stock \| Backorder Now \| Orders can be expected around Mon, May 26, 2025 Regular price $55.41 AUD Regular price Sale price $55.41 AUD Unit price per Each
Nominal Diameter	Grip Length (B)	Pin Material Grade	Locking Ball to End (C )	Indicative Image
Nominal Diameter 4.76 mm	Grip Length (B) 25.40 mm	Pin Material Grade 304 Stainless Steel	Locking Ball to End (C ) 6.60 mm
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80 Open Ball Distance (B): 5.59 mm
Part Number: BLP-048-0254-MRE-S4 Ball Lock Pins - 4.76x25.4 mm - 304 Stainless Steel Out of Stock \| Backorder Now \| Orders can be expected around Mon, May 26, 2025 Regular price $55.41 AUD Regular price Sale price $55.41 AUD Unit price per Each View the product page first if you are unsure.
BLP-048-0254-MRE-S4 --- Ball Lock Pins - 4.76x25.4 mm - 304 Stainless Steel BLP-048-0254-MRE-S4 --- Ball Lock Pins - 4.76x25.4 mm - 304 Stainless Steel Regular price $55.41 AUD Regular price Sale price $55.41 AUD Unit price per Out of stock! Backorder Now
Nominal Diameter 4.76 mm	Grip Length (B) 12.70 mm	Pin Material Grade 304 Stainless Steel	Locking Ball to End (C ) 6.60 mm	Open Ball Distance (B) 5.59 mm
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80
Part Number: BLP-048-0127-MRE-S4 Ball Lock Pins - 4.76x12.7 mm - 304 Stainless Steel Out of Stock \| Backorder Now \| Orders can be expected around Mon, May 26, 2025 Regular price $55.32 AUD Regular price Sale price $55.32 AUD Unit price per Each
Nominal Diameter 4.76 mm	Grip Length (B) 12.70 mm	Pin Material Grade 304 Stainless Steel	Locking Ball to End (C ) 6.60 mm
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80 Open Ball Distance (B): 5.59 mm
Part Number: BLP-048-0127-MRE-S4 Ball Lock Pins - 4.76x12.7 mm - 304 Stainless Steel Out of Stock \| Backorder Now \| Orders can be expected around Mon, May 26, 2025 Regular price $55.32 AUD Regular price Sale price $55.32 AUD Unit price per Each View the product page first if you are unsure.
BLP-048-0127-MRE-S4 --- Ball Lock Pins - 4.76x12.7 mm - 304 Stainless Steel BLP-048-0127-MRE-S4 --- Ball Lock Pins - 4.76x12.7 mm - 304 Stainless Steel Regular price $55.32 AUD Regular price Sale price $55.32 AUD Unit price per Out of stock! Backorder Now
Nominal Diameter 4.76 mm	Grip Length (B) 31.75 mm	Pin Material Grade 304 Stainless Steel	Locking Ball to End (C ) 6.60 mm	Open Ball Distance (B) 5.59 mm
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80
Part Number: BLP-048-0318-MRE-S4 Ball Lock Pins - 4.76x31.75 mm - 304 Stainless Steel Out of Stock \| Backorder Now \| Orders can be expected around Mon, May 26, 2025 Regular price $88.50 AUD Regular price Sale price $88.50 AUD Unit price per Each
Nominal Diameter 4.76 mm	Grip Length (B) 31.75 mm	Pin Material Grade 304 Stainless Steel	Locking Ball to End (C ) 6.60 mm
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80 Open Ball Distance (B): 5.59 mm
Part Number: BLP-048-0318-MRE-S4 Ball Lock Pins - 4.76x31.75 mm - 304 Stainless Steel Out of Stock \| Backorder Now \| Orders can be expected around Mon, May 26, 2025 Regular price $88.50 AUD Regular price Sale price $88.50 AUD Unit price per Each View the product page first if you are unsure.
BLP-048-0318-MRE-S4 --- Ball Lock Pins - 4.76x31.75 mm - 304 Stainless Steel BLP-048-0318-MRE-S4 --- Ball Lock Pins - 4.76x31.75 mm - 304 Stainless Steel Regular price $88.50 AUD Regular price Sale price $88.50 AUD Unit price per Out of stock! Backorder Now
Nominal Diameter 6.35 mm	Grip Length (B) 12.70 mm	Pin Material Grade 304 Stainless Steel	Locking Ball to End (C ) 9.65 mm	Open Ball Distance (B) 7.89 mm
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80
Part Number: BLP-064-0127-MRE-S4 Ball Lock Pins - 6.35x12.7 mm - 304 Stainless Steel Out of Stock \| Backorder Now \| Orders can be expected around Mon, May 26, 2025 Regular price $57.86 AUD Regular price Sale price $57.86 AUD Unit price per Each
Nominal Diameter 6.35 mm	Grip Length (B) 12.70 mm	Pin Material Grade 304 Stainless Steel	Locking Ball to End (C ) 9.65 mm
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80 Open Ball Distance (B): 7.89 mm
Part Number: BLP-064-0127-MRE-S4 Ball Lock Pins - 6.35x12.7 mm - 304 Stainless Steel Out of Stock \| Backorder Now \| Orders can be expected around Mon, May 26, 2025 Regular price $57.86 AUD Regular price Sale price $57.86 AUD Unit price per Each View the product page first if you are unsure.
BLP-064-0127-MRE-S4 --- Ball Lock Pins - 6.35x12.7 mm - 304 Stainless Steel BLP-064-0127-MRE-S4 --- Ball Lock Pins - 6.35x12.7 mm - 304 Stainless Steel Regular price $57.86 AUD Regular price Sale price $57.86 AUD Unit price per Out of stock! Backorder Now
Nominal Diameter 6.35 mm	Grip Length (B) 38.10 mm	Pin Material Grade 304 Stainless Steel	Locking Ball to End (C ) 9.65 mm	Open Ball Distance (B) 7.89 mm
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80
Part Number: BLP-064-0381-MRE-S4 Ball Lock Pins - 6.35x38.1 mm - 304 Stainless Steel Out of Stock \| Backorder Now \| Orders can be expected around Mon, May 26, 2025 Regular price $92.32 AUD Regular price Sale price $92.32 AUD Unit price per Each
Nominal Diameter 6.35 mm	Grip Length (B) 38.10 mm	Pin Material Grade 304 Stainless Steel	Locking Ball to End (C ) 9.65 mm
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80 Open Ball Distance (B): 7.89 mm
Part Number: BLP-064-0381-MRE-S4 Ball Lock Pins - 6.35x38.1 mm - 304 Stainless Steel Out of Stock \| Backorder Now \| Orders can be expected around Mon, May 26, 2025 Regular price $92.32 AUD Regular price Sale price $92.32 AUD Unit price per Each View the product page first if you are unsure.
BLP-064-0381-MRE-S4 --- Ball Lock Pins - 6.35x38.1 mm - 304 Stainless Steel BLP-064-0381-MRE-S4 --- Ball Lock Pins - 6.35x38.1 mm - 304 Stainless Steel Regular price $92.32 AUD Regular price Sale price $92.32 AUD Unit price per Out of stock! Backorder Now
Nominal Diameter 6.35 mm	Grip Length (B) 57.15 mm	Pin Material Grade 304 Stainless Steel	Locking Ball to End (C ) 9.65 mm	Open Ball Distance (B) 7.89 mm
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80
Part Number: BLP-064-0572-MRE-S4 (250 Pcs) Ball Lock Pins - 6.35x57.15 mm - 304 Stainless Steel Out of Stock \| Backorder Now \| Orders can be expected around Sat, Nov 29, 2025 Regular price $42,170.05 AUD Regular price Sale price $42,170.05 AUD Unit price per Per 250
Nominal Diameter 6.35 mm	Grip Length (B) 57.15 mm	Pin Material Grade 304 Stainless Steel	Locking Ball to End (C ) 9.65 mm
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80 Open Ball Distance (B): 7.89 mm
Part Number: BLP-064-0572-MRE-S4 (250 Pcs) Ball Lock Pins - 6.35x57.15 mm - 304 Stainless Steel Out of Stock \| Backorder Now \| Orders can be expected around Sat, Nov 29, 2025 Regular price $42,170.05 AUD Regular price Sale price $42,170.05 AUD Unit price per Per 250 View the product page first if you are unsure.
BLP-064-0572-MRE-S4 (250 Pcs) --- Ball Lock Pins - 6.35x57.15 mm - 304 Stainless Steel BLP-064-0572-MRE-S4 (250 Pcs) --- Ball Lock Pins - 6.35x57.15 mm - 304 Stainless Steel Regular price $42,170.05 AUD Regular price Sale price $42,170.05 AUD Unit price per Out of stock! Backorder Now
Nominal Diameter 7.94 mm	Grip Length (B) 19.05 mm	Pin Material Grade 304 Stainless Steel	Locking Ball to End (C ) 10.16 mm	Open Ball Distance (B) 9.45 mm
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80
Part Number: BLP-079-0191-MRE-S4 Ball Lock Pins - 7.94x19.05 mm - 304 Stainless Steel Out of Stock \| Backorder Now \| Orders can be expected around Mon, May 26, 2025 Regular price $84.14 AUD Regular price Sale price $84.14 AUD Unit price per Each
Nominal Diameter 7.94 mm	Grip Length (B) 19.05 mm	Pin Material Grade 304 Stainless Steel	Locking Ball to End (C ) 10.16 mm
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80 Open Ball Distance (B): 9.45 mm
Part Number: BLP-079-0191-MRE-S4 Ball Lock Pins - 7.94x19.05 mm - 304 Stainless Steel Out of Stock \| Backorder Now \| Orders can be expected around Mon, May 26, 2025 Regular price $84.14 AUD Regular price Sale price $84.14 AUD Unit price per Each View the product page first if you are unsure.
BLP-079-0191-MRE-S4 --- Ball Lock Pins - 7.94x19.05 mm - 304 Stainless Steel BLP-079-0191-MRE-S4 --- Ball Lock Pins - 7.94x19.05 mm - 304 Stainless Steel Regular price $84.14 AUD Regular price Sale price $84.14 AUD Unit price per Out of stock! Backorder Now
Nominal Diameter 12.70 mm	Grip Length (B) 25.40 mm	Pin Material Grade 304 Stainless Steel	Locking Ball to End (C ) 13.46 mm	Open Ball Distance (B) 15.06 mm
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80
Part Number: BLP-127-0254-MRE-S4 Ball Lock Pins - 12.7x25.4 mm - 304 Stainless Steel Out of Stock \| Backorder Now \| Orders can be expected around Mon, May 26, 2025 Regular price $110.77 AUD Regular price Sale price $110.77 AUD Unit price per Each
Nominal Diameter 12.70 mm	Grip Length (B) 25.40 mm	Pin Material Grade 304 Stainless Steel	Locking Ball to End (C ) 13.46 mm
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80 Open Ball Distance (B): 15.06 mm
Part Number: BLP-127-0254-MRE-S4 Ball Lock Pins - 12.7x25.4 mm - 304 Stainless Steel Out of Stock \| Backorder Now \| Orders can be expected around Mon, May 26, 2025 Regular price $110.77 AUD Regular price Sale price $110.77 AUD Unit price per Each View the product page first if you are unsure.
BLP-127-0254-MRE-S4 --- Ball Lock Pins - 12.7x25.4 mm - 304 Stainless Steel BLP-127-0254-MRE-S4 --- Ball Lock Pins - 12.7x25.4 mm - 304 Stainless Steel Regular price $110.77 AUD Regular price Sale price $110.77 AUD Unit price per Out of stock! Backorder Now
Nominal Diameter 12.70 mm	Grip Length (B) 88.90 mm	Pin Material Grade 304 Stainless Steel	Locking Ball to End (C ) 13.46 mm	Open Ball Distance (B) 15.06 mm
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80
Part Number: BLP-127-0889-MRE-S4 Ball Lock Pins - 12.7x88.9 mm - 304 Stainless Steel Out of Stock \| Backorder Now \| Orders can be expected around Thu, Jun 12, 2025 Regular price $182.05 AUD Regular price Sale price $182.05 AUD Unit price per Each
Nominal Diameter 12.70 mm	Grip Length (B) 88.90 mm	Pin Material Grade 304 Stainless Steel	Locking Ball to End (C ) 13.46 mm
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80 Open Ball Distance (B): 15.06 mm
Part Number: BLP-127-0889-MRE-S4 Ball Lock Pins - 12.7x88.9 mm - 304 Stainless Steel Out of Stock \| Backorder Now \| Orders can be expected around Thu, Jun 12, 2025 Regular price $182.05 AUD Regular price Sale price $182.05 AUD Unit price per Each View the product page first if you are unsure.
BLP-127-0889-MRE-S4 --- Ball Lock Pins - 12.7x88.9 mm - 304 Stainless Steel BLP-127-0889-MRE-S4 --- Ball Lock Pins - 12.7x88.9 mm - 304 Stainless Steel Regular price $182.05 AUD Regular price Sale price $182.05 AUD Unit price per Out of stock! Backorder Now
Nominal Diameter 12.70 mm	Grip Length (B) 101.60 mm	Pin Material Grade 304 Stainless Steel	Locking Ball to End (C ) 13.46 mm	Open Ball Distance (B) 15.06 mm
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80
Part Number: BLP-127-1016-MRE-S4 Ball Lock Pins - 12.7x101.6 mm - 304 Stainless Steel Out of Stock \| Backorder Now \| Orders can be expected around Mon, May 26, 2025 Regular price $154.14 AUD Regular price Sale price $154.14 AUD Unit price per Each
Nominal Diameter 12.70 mm	Grip Length (B) 101.60 mm	Pin Material Grade 304 Stainless Steel	Locking Ball to End (C ) 13.46 mm
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80 Open Ball Distance (B): 15.06 mm
Part Number: BLP-127-1016-MRE-S4 Ball Lock Pins - 12.7x101.6 mm - 304 Stainless Steel Out of Stock \| Backorder Now \| Orders can be expected around Mon, May 26, 2025 Regular price $154.14 AUD Regular price Sale price $154.14 AUD Unit price per Each View the product page first if you are unsure.
BLP-127-1016-MRE-S4 --- Ball Lock Pins - 12.7x101.6 mm - 304 Stainless Steel BLP-127-1016-MRE-S4 --- Ball Lock Pins - 12.7x101.6 mm - 304 Stainless Steel Regular price $154.14 AUD Regular price Sale price $154.14 AUD Unit price per Out of stock! Backorder Now
Nominal Diameter 12.70 mm	Grip Length (B) 63.50 mm	Pin Material Grade 304 Stainless Steel	Locking Ball to End (C ) 13.46 mm	Open Ball Distance (B) 15.06 mm
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80
Part Number: BLP-127-0635-MRE-S4 Ball Lock Pins - 12.7x63.5 mm - 304 Stainless Steel Out of Stock \| Backorder Now \| Orders can be expected around Mon, May 26, 2025 Regular price $164.68 AUD Regular price Sale price $164.68 AUD Unit price per Each
Nominal Diameter 12.70 mm	Grip Length (B) 63.50 mm	Pin Material Grade 304 Stainless Steel	Locking Ball to End (C ) 13.46 mm
Material: Stainless Steel 304 (Similar to A2, 18-8) HRB80 Open Ball Distance (B): 15.06 mm
Part Number: BLP-127-0635-MRE-S4 Ball Lock Pins - 12.7x63.5 mm - 304 Stainless Steel Out of Stock \| Backorder Now \| Orders can be expected around Mon, May 26, 2025 Regular price $164.68 AUD Regular price Sale price $164.68 AUD Unit price per Each View the product page first if you are unsure.
BLP-127-0635-MRE-S4 --- Ball Lock Pins - 12.7x63.5 mm - 304 Stainless Steel BLP-127-0635-MRE-S4 --- Ball Lock Pins - 12.7x63.5 mm - 304 Stainless Steel Regular price $164.68 AUD Regular price Sale price $164.68 AUD Unit price per Out of stock! Backorder Now