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EN2634NP5 — NUT,SELF-LOCKING,CLINCH

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

EN2634NP5: NUT,SELF-LOCKING,CLINCH.

The NUT,SELF-LOCKING,CLINCH is a the manufacturer industrial component. Key specifications include material: IRON ALLOY 660 OVERALL, nut_style: CLINCH, nut_height: 0.275 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNJC, pilot_diameter: 0.219 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-485-7517, 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
EN2634NP5
NSN: 5310-01-485-7517
FSC: 5310 — Nuts and Washers
CAGE: 15653 — HOWMET GLOBAL FASTENING SYSTEMS INC (USA)
SPECIFICATIONS
materialIRON ALLOY 660 OVERALL
nut_styleCLINCH
nut_height0.275 INCHES NOMINAL IN
thread_class3B
thread_seriesUNJC
pilot_diameter0.219 INCHES NOMINAL IN
locking_featurePREVAILING TORQUE ALL METAL DESIGN
special_featuresNUT, EDDIE-CORNER TO CORNER DIA .354, CENTER DIA .219, HEX THICKNESS .090, TENSILE STRENGTH 2,300 LBS LBS
thread_directionRIGHT-HAND
width_across_flats0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN
nominal_thread_size0.1640 INCHES IN
counterbore_diameter0.167 INCHES MINIMUM AND 0.173 INCHES MAXIMUM NUT IN
NSN5310-01-485-7517
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: EN2634NP5 · 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
•
WIDTH ACROSS FLATS: 0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN
•
THREAD SERIES: UNJC
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5731 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5734 ASSN STD 2ND MATERIAL RESPONSE OVERALL
•
NUT COUNTERBORE DEPTH: 0.095 INCHES NOMINAL NUT IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.1640 INCHES IN
•
COUNTERBORE DIAMETER: 0.167 INCHES MINIMUM AND 0.173 INCHES MAXIMUM NUT IN
•
PILOT DIAMETER: 0.219 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN
THREAD SERIESUNJC
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5731 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5734 ASSN STD 2ND MATERIAL RESPONSE OVERALL
NUT COUNTERBORE DEPTH0.095 INCHES NOMINAL NUT IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.1640 INCHES IN
COUNTERBORE DIAMETER0.167 INCHES MINIMUM AND 0.173 INCHES MAXIMUM NUT IN
PILOT DIAMETER0.219 INCHES NOMINAL IN
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
NUT HEIGHT0.275 INCHES NOMINAL IN
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
ST2961-05Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is EN2634NP5?
EN2634NP5 is a NUT,SELF-LOCKING,CLINCH.
What parts can replace EN2634NP5?
There is 1 known substitute for EN2634NP5: ST2961-05. Substitute compatibility should be verified for your specific system.
What is the NSN for EN2634NP5?
EN2634NP5 is cataloged in the U.S. Government catalog under NSN 5310-01-485-7517. 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.