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220775 — CONTACT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

220775: CONTACT.

The CONTACT is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 6061, nut_style: CASTELLATED, HEXAGON, nut_height: 0.318 INCHES MINIMUM AND 0.338 INCHES MAXIMUM IN, thread_class: 3B, hole_diameter: 2.182 INCHES MINIMUM AND 2.207 INCHES MAXIMUM IN, thread_series: UNF. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-186-0970, 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
220775
NSN: 5310-00-186-0970
NIINs: 001860970, 005969010, 009479355, 014567622, 016408567
FSC: 5310 — Nuts and Washers
CAGE: 55737 — DRESSER CONSTRUCTION AND MINING EQUIPMENT DRESSER INDUSTRIES INC JEFFREY DIV PROCESSING EQUIPMENT (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 6061
nut_styleCASTELLATED, HEXAGON
nut_height0.318 INCHES MINIMUM AND 0.338 INCHES MAXIMUM IN
thread_class3B
hole_diameter2.182 INCHES MINIMUM AND 2.207 INCHES MAXIMUM IN
thread_seriesUNF
hardness_rating50.0 ROCKWELL B MINIMUM AND 81.0 ROCKWELL B MAXIMUM
outside_diameter2.656 INCHES MINIMUM AND 2.686 INCHES MAXIMUM IN
special_featuresCATT TRANSFER ASSEMBLY
style_designatorKEY
thread_directionRIGHT-HAND
countersink_angle85.0 DEGREES MINIMUM AND 95.0 DEGREES MAXIMUM NUT
NSN5310-00-186-0970
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 220775 · 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
•
INTERNAL PREBENT KEY WIDTH: 0.250 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
•
OVERALL DISTANCE INCLUDING KEYS: 3.109 INCHES MAXIMUM IN
•
HARDNESS RATING: 50.0 ROCKWELL B MINIMUM AND 81.0 ROCKWELL B MAXIMUM
•
STYLE DESIGNATOR: KEY
•
OUTSIDE DIAMETER: 2.656 INCHES MINIMUM AND 2.686 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.058 INCHES MINIMUM AND 0.068 INCHES MAXIMUM IN
•
EXTERNAL KEY QUANTITY: 17
•
INTERNAL PREBENT KEY LENGTH: 0.125 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
INTERNAL PREBENT KEY WIDTH0.250 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
OVERALL DISTANCE INCLUDING KEYS3.109 INCHES MAXIMUM IN
HARDNESS RATING50.0 ROCKWELL B MINIMUM AND 81.0 ROCKWELL B MAXIMUM
STYLE DESIGNATORKEY
OUTSIDE DIAMETER2.656 INCHES MINIMUM AND 2.686 INCHES MAXIMUM IN
MATERIAL THICKNESS0.058 INCHES MINIMUM AND 0.068 INCHES MAXIMUM IN
EXTERNAL KEY QUANTITY17
INTERNAL PREBENT KEY LENGTH0.125 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN
EXTERNAL PREBENT KEY WIDTH0.204 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN
MATERIALSTEEL COMP 1010 OR STEEL COMP 1012 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OVERALL
SUBSTITUTES & CROSS-REFERENCES 10
W8GTM500X2PC241AReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
Z10ALV241X1-351Reference document
Same NSN cross-reference
Reference document — Secondary reference
SG2293PC30Reference document
Same NSN cross-reference
Reference document — Secondary reference
W11Reference document
Same NSN cross-reference
Reference document — Secondary reference
G378821PC39Reference document
Same NSN cross-reference
Reference document — Secondary reference
C3593-7PC130Reference 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 220775?
220775 is a CONTACT.
What parts can replace 220775?
There are 10 known substitutes for 220775: W8GTM500X2PC241A, Z10ALV241X1-351, SG2293PC30 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 220775?
220775 is cataloged in the U.S. Government catalog under NSN 5310-00-186-0970. 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.