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QR616 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

QR616: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1060 OR STEEL COMP 1211 OVERALL, hole_diameter: 0.377 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN, heat_treatment: QUENCHED AND TEMPERED, hardness_rating: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM, outside_diameter: 0.671 INCHES MAXIMUM IN, special_features: BOTH BEARING SURFACES SERRATED RAISED RIB ON BOTH SIDES ON INNER AND OUTER PERIPHERY. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-005-0620, 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
QR616
NSN: 5310-00-005-0620
FSC: 5310 — Nuts and Washers
CAGE: 77252 — PHILADELPHIA STEEL AND WIRE CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 1060 OR STEEL COMP 1211 OVERALL
hole_diameter0.377 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
heat_treatmentQUENCHED AND TEMPERED
hardness_rating45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
outside_diameter0.671 INCHES MAXIMUM IN
special_featuresBOTH BEARING SURFACES SERRATED RAISED RIB ON BOTH SIDES ON INNER AND OUTER PERIPHERY
style_designatorSPLIT HELICAL-RIGHT HAND
surface_treatmentCADMIUM OR ZINC OVERALL
material_thickness0.091 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN
end_item_identificationLOGISTICS SUPPORT VESSEL
material_document_and_classificationASTM A576 ASSN STD 1ST MATERIAL RESPONSE OR 66 FED STD 2ND MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationQQ-P-416,TY 2,CL 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TY 2,CL 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL
NSN5310-00-005-0620
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: QR616 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TY 2,CL 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL
•
HEAT TREATMENT: QUENCHED AND TEMPERED
•
HARDNESS RATING: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: SPLIT HELICAL-RIGHT HAND
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A576 ASSN STD 1ST MATERIAL RESPONSE OR 66 FED STD 2ND MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.671 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.091 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TY 2,CL 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL
HEAT TREATMENTQUENCHED AND TEMPERED
HARDNESS RATING45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORSPLIT HELICAL-RIGHT HAND
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A576 ASSN STD 1ST MATERIAL RESPONSE OR 66 FED STD 2ND MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.671 INCHES MAXIMUM IN
MATERIAL THICKNESS0.091 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN
SPECIAL FEATURESBOTH BEARING SURFACES SERRATED RAISED RIB ON BOTH SIDES ON INNER AND OUTER PERIPHERY
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
END ITEM IDENTIFICATIONLOGISTICS SUPPORT VESSEL
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 1
11648629-3Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is QR616?
QR616 is a WASHER,LOCK.
What parts can replace QR616?
There is 1 known substitute for QR616: 11648629-3. Substitute compatibility should be verified for your specific system.
What is the NSN for QR616?
QR616 is cataloged in the U.S. Government catalog under NSN 5310-00-005-0620. 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.