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NL27 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

NL27: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 1.108 INCHES MINIMUM AND 1.128 INCHES MAXIMUM IN, overall_height: 0.260 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN, hardness_rating: 33.0 ROCKWELL C MINIMUM AND 39.0 ROCKWELL C MAXIMUM, outside_diameter: 1.639 INCHES MINIMUM AND 1.669 INCHES MAXIMUM IN, style_designator: TWO PIECE INTERLOCKING. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-623-7144, 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
NL27
NSN: 5310-01-623-7144
FSC: 5310 — Nuts and Washers
CAGE: 1PUD1 — NORD LOCK INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter1.108 INCHES MINIMUM AND 1.128 INCHES MAXIMUM IN
overall_height0.260 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN
hardness_rating33.0 ROCKWELL C MINIMUM AND 39.0 ROCKWELL C MAXIMUM
outside_diameter1.639 INCHES MINIMUM AND 1.669 INCHES MAXIMUM IN
style_designatorTWO PIECE INTERLOCKING
surface_treatmentZINC OVERALL
end_item_identification2350-01-305-0028
material_document_and_classificationEN 1.7182 IAW EN10083-3 MFR REF SINGLE MATERIAL RESPONSE OR ASTM A505 OR A506,QUENCH AND TEMPER ASSN STD SINGLE MATERIAL RESPONSE OVERALL
part_name_assigned_by_controlling_agencyLOCK WASHER SET
surface_treatment_document_and_classificationASTM B633,COND.2,TYPE VI;EMBRITTLEMENT RELIEF PER ASTM B850,CLASS ER-8 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
NSN5310-01-623-7144
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: NL27 · 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: ASTM B633,COND.2,TYPE VI;EMBRITTLEMENT RELIEF PER ASTM B850,CLASS ER-8 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
HARDNESS RATING: 33.0 ROCKWELL C MINIMUM AND 39.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: TWO PIECE INTERLOCKING
•
MATERIAL DOCUMENT AND CLASSIFICATION: EN 1.7182 IAW EN10083-3 MFR REF SINGLE MATERIAL RESPONSE OR ASTM A505 OR A506,QUENCH AND TEMPER ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 1.639 INCHES MINIMUM AND 1.669 INCHES MAXIMUM IN
•
SURFACE TREATMENT: ZINC OVERALL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.260 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM B633,COND.2,TYPE VI;EMBRITTLEMENT RELIEF PER ASTM B850,CLASS ER-8 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING33.0 ROCKWELL C MINIMUM AND 39.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORTWO PIECE INTERLOCKING
MATERIAL DOCUMENT AND CLASSIFICATIONEN 1.7182 IAW EN10083-3 MFR REF SINGLE MATERIAL RESPONSE OR ASTM A505 OR A506,QUENCH AND TEMPER ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER1.639 INCHES MINIMUM AND 1.669 INCHES MAXIMUM IN
SURFACE TREATMENTZINC OVERALL
PART NAME ASSIGNED BY CONTROLLING AGENCYLOCK WASHER SET
END ITEM IDENTIFICATION2350-01-305-0028
MATERIALSTEEL OVERALL
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
12492376Same 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 NL27?
NL27 is a WASHER,LOCK.
What parts can replace NL27?
There is 1 known substitute for NL27: 12492376. Substitute compatibility should be verified for your specific system.
What is the NSN for NL27?
NL27 is cataloged in the U.S. Government catalog under NSN 5310-01-623-7144. 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.