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PartsTable / COMPONENT / GR520A16
GR520A16 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The RECEPTACLE,TURNLOCK FASTENER is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, mounting_style: PLAIN W/MOUNTING HOLE, receptacle_width: 0.690 INCHES NOMINAL IN, receptacle_height: 0.526 INCHES NOMINAL IN, receptacle_overall_length: 1.380 INCHES NOMINAL IN, turnlock_receptacle_style: RECEPTACLE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-109-0285, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
GR520A16
NSN: 5325-00-109-0285
FSC: 5325
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
mounting_stylePLAIN W/MOUNTING HOLE
receptacle_width0.690 INCHES NOMINAL IN
receptacle_height0.526 INCHES NOMINAL IN
receptacle_overall_length1.380 INCHES NOMINAL IN
turnlock_receptacle_styleRECEPTACLE
turnlock_mounting_hole_diameter0.130 INCHES NOMINAL IN
center_to_center_distance_between_mounting_holes1.000 INCHES NOMINAL IN
reference_number_differentiating_characteristicsAS DIFFERENTIATED BY PACKAGING IN ACCORDANCE WITH MIL-P-23199 AND MATERIAL CONFORMING TO SHIPS PARTS CONTROL CENTER SPECIAL QUALITY CONTROL PROVISIONS
NSN5325-00-109-0285
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: GR520A16 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MATERIAL: COPPER ALLOY OVERALL
•
RECEPTACLE OVERALL LENGTH: 1.380 INCHES NOMINAL IN
•
RECEPTACLE WIDTH: 0.690 INCHES NOMINAL IN
•
TURNLOCK RECEPTACLE STYLE: RECEPTACLE
•
TURNLOCK MOUNTING HOLE DIAMETER: 0.130 INCHES NOMINAL IN
•
RECEPTACLE HEIGHT: 0.526 INCHES NOMINAL IN
•
MOUNTING STYLE: PLAIN W/MOUNTING HOLE
•
CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES: 1.000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALCOPPER ALLOY OVERALL
RECEPTACLE OVERALL LENGTH1.380 INCHES NOMINAL IN
RECEPTACLE WIDTH0.690 INCHES NOMINAL IN
TURNLOCK RECEPTACLE STYLERECEPTACLE
TURNLOCK MOUNTING HOLE DIAMETER0.130 INCHES NOMINAL IN
RECEPTACLE HEIGHT0.526 INCHES NOMINAL IN
MOUNTING STYLEPLAIN W/MOUNTING HOLE
CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES1.000 INCHES NOMINAL IN
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSAS DIFFERENTIATED BY PACKAGING IN ACCORDANCE WITH MIL-P-23199 AND MATERIAL CONFORMING TO SHIPS PARTS CONTROL CENTER SPECIAL QUALITY CONTROL PROVISIONS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
21416Interchangeable
interchangeable cross-reference
interchangeable
7000H17Interchangeable
interchangeable cross-reference
interchangeable
1508-16Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-24135/2Interchangeable
interchangeable cross-reference
interchangeable
6166342Interchangeable
interchangeable cross-reference
interchangeable
10922419Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is GR520A16?
GR520A16 is a RECEPTACLE,TURNLOCK FASTENER.
What parts can replace GR520A16?
There are 17 known substitutes for GR520A16: 21416, 7000H17, 1508-16 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for GR520A16?
GR520A16 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-109-0285. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026