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7A029057 — Technical Data Sheet

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— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The WASHER,SHOULDERED AND RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, recess_depth: 0.1731 INCHES MINIMUM AND 0.1931 INCHES MAXIMUM IN, hole_diameter: 0.3406 INCHES MINIMUM AND 0.3606 INCHES MAXIMUM IN, heat_treatment: AS FABRICATED, recess_diameter: 0.7313 INCHES MINIMUM AND 0.7513 INCHES MAXIMUM IN, shoulder_height: 0.1731 INCHES MINIMUM AND 0.1931 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 5310-00-371-3128, 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
7A029057
NSN: 5310-00-371-3128
FSC: 5310
CAGE: 23382 — FWD SEAGRAVE HOLDINGS LP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
recess_depth0.1731 INCHES MINIMUM AND 0.1931 INCHES MAXIMUM IN
hole_diameter0.3406 INCHES MINIMUM AND 0.3606 INCHES MAXIMUM IN
heat_treatmentAS FABRICATED
recess_diameter0.7313 INCHES MINIMUM AND 0.7513 INCHES MAXIMUM IN
shoulder_height0.1731 INCHES MINIMUM AND 0.1931 INCHES MAXIMUM IN
outside_diameter1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM IN
style_designatorSHOULDERED AND RECESSED
shoulder_diameter0.7713 INCHES MINIMUM AND 0.7913 INCHES MAXIMUM IN
surface_treatmentCADMIUM OVERALL
material_thickness0.020 INCHES NOMINAL IN
NSN5310-00-371-3128
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 7A029057 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MATERIAL: STEEL OVERALL
•
SHOULDER HEIGHT: 0.1731 INCHES MINIMUM AND 0.1931 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.020 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SHOULDERED AND RECESSED
•
OUTSIDE DIAMETER: 1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM IN
•
RECESS DIAMETER: 0.7313 INCHES MINIMUM AND 0.7513 INCHES MAXIMUM IN
•
SHOULDER DIAMETER: 0.7713 INCHES MINIMUM AND 0.7913 INCHES MAXIMUM IN
•
HOLE DIAMETER: 0.3406 INCHES MINIMUM AND 0.3606 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
MATERIALSTEEL OVERALL
SHOULDER HEIGHT0.1731 INCHES MINIMUM AND 0.1931 INCHES MAXIMUM IN
MATERIAL THICKNESS0.020 INCHES NOMINAL IN
STYLE DESIGNATORSHOULDERED AND RECESSED
OUTSIDE DIAMETER1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM IN
RECESS DIAMETER0.7313 INCHES MINIMUM AND 0.7513 INCHES MAXIMUM IN
SHOULDER DIAMETER0.7713 INCHES MINIMUM AND 0.7913 INCHES MAXIMUM IN
HOLE DIAMETER0.3406 INCHES MINIMUM AND 0.3606 INCHES MAXIMUM IN
RECESS DEPTH0.1731 INCHES MINIMUM AND 0.1931 INCHES MAXIMUM IN
HEAT TREATMENTAS FABRICATED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
22380InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
TH 02-903-6InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
02-903-6InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 7A029057?
7A029057 is a WASHER,SHOULDERED AND RECESSED.
What parts can replace 7A029057?
There are 3 known substitutes for 7A029057: 22380, TH 02-903-6, 02-903-6. Substitute compatibility should be verified for your specific system.
What is the NSN for 7A029057?
7A029057 is cataloged in the Federal Logistics Information System under NSN 5310-00-371-3128. This indicates validated use in U.S. government and defense supply chains.
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Last verified: September 2026