PartsTable
Technical Data Sheet
2633-561-01 PC 137-1 ✓ Verified by PartsTable
· 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 NUT,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: NICKEL NUT, nut_style: HEXAGON, nut_height: 0.438 INCHES MINIMUM AND 0.468 INCHES MAXIMUM IN, thread_class: 3B, thread_series: UNIFIED NATIONAL COARSE (UNC), locking_feature: PREVAILING TORQUE WITH NONMETALLIC INSERT. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-701-5786, 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
2633-561-01 PC 137-1
NSN: 5310-00-701-5786
FSC: 5310
CAGE: 96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
SPECIFICATIONS
materialNICKEL NUT
nut_styleHEXAGON
nut_height0.438 INCHES MINIMUM AND 0.468 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
locking_featurePREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
width_across_flats0.553 INCHES MINIMUM AND 0.656 INCHES MAXIMUM IN
nominal_thread_size0.375 INCHES IN
bearing_surface_typeWASHER FACED
thread_quantity_per_inch16
material_document_and_classificationASTM D4066,COMP A,TYPE 1 ASSN STD SINGLE MATERIAL RESPONSE LOCKING INSERT
NSN5310-00-701-5786
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2633-561-01 PC 137-1 · 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: PLASTIC POLYAMIDE NYLON LOCKING INSERT
THREAD QUANTITY PER INCH: 16
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
BEARING SURFACE TYPE: WASHER FACED
NOMINAL THREAD SIZE: 0.375 INCHES IN
THREAD CLASS: 3B
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALPLASTIC POLYAMIDE NYLON LOCKING INSERT
THREAD QUANTITY PER INCH16
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
BEARING SURFACE TYPEWASHER FACED
NOMINAL THREAD SIZE0.375 INCHES IN
MATERIALNICKEL NUT
THREAD CLASS3B
THREAD DIRECTIONRIGHT-HAND
LOCKING FEATUREPREVAILING TORQUE WITH NONMETALLIC INSERT
NUT HEIGHT0.438 INCHES MINIMUM AND 0.468 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 31
H3129120PC132Interchangeable
interchangeable cross-reference
interchangeable
M37600PC287Interchangeable
interchangeable cross-reference
interchangeable
54101S58-85ALT2PC126Interchangeable
interchangeable cross-reference
interchangeable
1F-7764 PIECE 44-4Interchangeable
interchangeable cross-reference
interchangeable
1F-8615 PC 44-4Interchangeable
interchangeable cross-reference
interchangeable
3/8-16UNC-2BInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2633-561-01 PC 137-1?
2633-561-01 PC 137-1 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 2633-561-01 PC 137-1?
There are 31 known substitutes for 2633-561-01 PC 137-1: H3129120PC132, M37600PC287, 54101S58-85ALT2PC126 and 28 more. Substitute compatibility should be verified for your specific system.
Is 2633-561-01 PC 137-1 still available?
2633-561-01 PC 137-1 is currently cancelled.
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