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137H — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

137H: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.256 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN, outside_diameter: 0.460 INCHES MINIMUM AND 0.478 INCHES MAXIMUM IN, style_designator: FLAT INTERNAL TEETH, surface_treatment: CADMIUM OR ZINC OVERALL, material_thickness: 0.023 INCHES MINIMUM AND 0.028 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-012-0423, 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
137H
NSN: 5310-00-012-0423
FSC: 5310 — Nuts and Washers
CAGE: 16783 — DELTA ELECTRIC DIV HALLE INDUSTRIES INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.256 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN
outside_diameter0.460 INCHES MINIMUM AND 0.478 INCHES MAXIMUM IN
style_designatorFLAT INTERNAL TEETH
surface_treatmentCADMIUM OR ZINC OVERALL
material_thickness0.023 INCHES MINIMUM AND 0.028 INCHES MAXIMUM IN
nondefinitive_spec/std_dataA TYPE
material_document_and_classificationQQ-S-633,FS1060 TO FS1080-CANCELLED FED SPEC ALL MATERIAL RESPONSES OVERALL
NSN5310-00-012-0423
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 137H · 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
•
STYLE DESIGNATOR: FLAT INTERNAL TEETH
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633,FS1060 TO FS1080-CANCELLED FED SPEC ALL MATERIAL RESPONSES OVERALL
•
OUTSIDE DIAMETER: 0.460 INCHES MINIMUM AND 0.478 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.023 INCHES MINIMUM AND 0.028 INCHES MAXIMUM IN
•
NONDEFINITIVE SPEC/STD DATA: A TYPE
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
•
MATERIAL: STEEL OVERALL
•
HOLE DIAMETER: 0.256 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORFLAT INTERNAL TEETH
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633,FS1060 TO FS1080-CANCELLED FED SPEC ALL MATERIAL RESPONSES OVERALL
OUTSIDE DIAMETER0.460 INCHES MINIMUM AND 0.478 INCHES MAXIMUM IN
MATERIAL THICKNESS0.023 INCHES MINIMUM AND 0.028 INCHES MAXIMUM IN
NONDEFINITIVE SPEC/STD DATAA TYPE
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
MATERIALSTEEL OVERALL
HOLE DIAMETER0.256 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 9
120423Reference document
Same NSN cross-reference
Reference document — Secondary reference
1901842Reference document
Same NSN cross-reference
Reference document — Secondary reference
20-463-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
34905S7S8Reference document
Same NSN cross-reference
Reference document — Secondary reference
65756Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
GP1076-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 137H?
137H is a WASHER,LOCK.
What parts can replace 137H?
There are 9 known substitutes for 137H: 120423, 1901842, 20-463-1 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 137H?
137H is cataloged in the U.S. Government catalog under NSN 5310-00-012-0423. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.