Quote for 51B221-21 Northrop Grumman Technical Services Inc Part with NSN 5305-01-049-1251

Part Number:  51B221-21
Alternate P/N:  51B22121
NIIN:  10491251
Item Name :  screw close toleran
CAGE Code:  0JRC1
FSC:  5305 Screws
INC Code:  29294
Country:  USA
NCB Code:  01
FSG:  53 Hardware and Abrasives
Last Updated:  03-13-2026

Are you looking quote for part 51B221-21? The Northrop Grumman Technical Services Inc-manufactured component (CAGE Code: 0JRC1) is documented under NSN 5305-01-049-1251 as Screw Close Toleran. For the fastest quote, please complete our RFQ form with details about 51B221-21. We guarantee a response within 15 minutes.

ASAP Components provides the verified 51B221-21, classified under INC 29294, FSG 53 Hardware and Abrasives, FSC 5305 Screws, NIIN 01-049-1251, and NCB 01. Submit your requirements today to receive immediate pricing and availability information.

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NSN Information for Part Number 51B221-21 with NSN 5305-01-049-1251, 5305010491251

NSNFSCNIINCLSHazmatDEMILCancelled NSN
5305-01-049-1251

Item PartTypeName:

SCREW,CLOSE TOLERANCE

53050104912510N
CIICHCCESDPMICCriticalityENAC
U U
Part NumberISCRNVCRNCCHCCMSDSSADC
51B221-2161C9

Characteristics Data of NSN 5305-01-049-1251, 5305010491251

MRCCriteriaCharacteristic
AAJDTHREAD CLASS3A
AAJFTHREAD DIRECTIONRIGHT-HAND
AASATHREAD LENGTH0.246 INCHES MINIMUM AND 0.323 INCHES MAXIMUM
AASBFASTENER LENGTH1.573 INCHES MINIMUM AND 1.620 INCHES MAXIMUM
AASKHEAD STYLEPAN
AASLHEAD DIAMETER0.361 INCHES MINIMUM AND 0.381 INCHES MAXIMUM
AASUHEAD HEIGHT0.103 INCHES MINIMUM AND 0.118 INCHES MAXIMUM
AAURGRIP DIAMETER0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM
ABQZINTERNAL DRIVE STYLEOFFSET CRUCIFORM (TORQUE SET)
AHYMNOMINAL THREAD DIAMETER0.190 INCHES
ANEEGRIP LENGTH1.297 INCHES MINIMUM AND 1.327 INCHES MAXIMUM
CMLPTHREAD QUANTITY PER INCH32
CQBCMINIMUM TENSILE STRENGTH180000 POUNDS PER SQUARE INCH
CQFMHARDNESS RATING39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
CSYMSURFACE FINISH32.0 MICROINCHES GRIP
MATTMATERIALSTEEL COMP E4340 OR STEEL COMP 4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OVERALL
SFTTSURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
STDCSURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THSDTHREAD SERIES DESIGNATORUNJF
ZZZKSPECIFICATION/STANDARD DATA86823-51B221 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD

Schedule B & Trade

End Use : 12110 Iron and steel products, other
Schedule B : 7318152000 (NAICS 332722) Bolts and bolts and their nuts or washers exported in the same shipment
SITC : 69421 Screws, bolts, nuts, screw hooks, rivets, washers and similar articles, threaded, of iron or steel

Identification

CRITL The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
HMIC N - Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
PMIC U - Precious metal content is unknown

NSN Management Codes

AAC V
Classification Control U
MGMT_CTL Sf9sx-v
Quantity per pack 1
Repariability
Shelf Life N/A
SOS Sms
Unit of Measure Ea

Freight Information

ACC: B - Construction materials: includes paint and related materials, prefabricated building, wood products, metal and composition mater
ADC: A - Shipment is not a consolidation and does not exceed 84 inches in any dimension.
LTL: W - Rating variable
NMFC: 093486 - Bolts, nuts or screws, noi (sub 3)
SHC: 9 - Other or no special handling required (sh)
TCC: Z - No special type of cargo code applicable
WCC: 713 - Metal hardware

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