Part identity

0121A4MA

Knob

Jan Engineering Co

Avg quote: 14 minFulfilled from Anaheim, CAAS9120:2025 · ISO 9001 · FAA AC 00-56BC of C, lot & date code with every line

Part description

Knob

ASAP supports this specific part for replacement, spare-pool replenishment, retrofit, and urgent maintenance requirements. Quote requests can include alternate MPN, condition preferences, certification needs, and plant-specific receiving instructions so procurement gets a clear sourcing response before purchase.

Specifications

MPN
0121A4MA
Item name
Knob
Manufacturer code
99813
Manufacturer
Jan Engineering Co

Certifications & documentation

  • UL Recognized
  • CE
  • C of C available on request
JE

Manufacturer

Jan Engineering Co

Authorized-distributor or qualified-aftermarket source. Parts shipped from this manufacturer include full traceability paperwork and counterfeit-mitigation per SAE AS6081.

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NSN Information for Part Number 0121A4MA with NSN 5355-00-728-9481, 5355007289481

NSNFSCNIINCLSHazmatDEMILCancelled NSN
5355007289481

Item Description:

Knob

53550072894810N
CIICHCCESDPMICCriticalityENAC
U U
Part NumberISCRNVCRNCCHCCMSDSSADC
0121a4ma215

Characteristics Data of NSN 5355-00-728-9481, 5355007289481

MRCCriteriaCharacteristic
AARXINSIDE DIAMETER0.252 INCHES MINIMUM AND 0.254 INCHES MAXIMUM
AAWYCOUNTERBORE DIAMETER0.750 INCHES MINIMUM
AAWZCOUNTERBORE DEPTH0.114 INCHES MINIMUM
ABFRSETSCREW HOLE QUANTITY2
ABFUDISTANCE FROM HOLE CENTER TO KNOB/SKIRT BASE0.260 INCHES MAXIMUM
ABFYOVERALL DEPTH0.515 INCHES MINIMUM AND 0.545 INCHES MAXIMUM
ABHGGRIPPING SURFACE CONDITIONGRIP AID
ABHHSHAFT ACCOMMODATION STYLECOUNTERBORED
ABKVOUTSIDE DIAMETER1.240 INCHES MINIMUM AND 1.280 INCHES MAXIMUM
ABSXATTACHMENT METHODSETSCREWS
ADUMOVERALL THICKNESS0.515 INCHES MINIMUM AND 0.545 INCHES MAXIMUM
AJQEMATERIAL TRANSPARENCYOPAQUE
CBSCSCREW DRIVE TYPEHEXAGON SOCKET
CMLPTHREAD QUANTITY PER INCH32 SCREW HOLE
CQJXNOMINAL THREAD SIZE0.164 INCHES SCREW HOLE
HUESCOLORBLACK, LUSTERLESS
STYLSTYLE DESIGNATORROUND
FEATSPECIAL FEATURESCONCENTRIC
THSDTHREAD SERIES DESIGNATORUNC SCREW HOLE
Integrated Electromechanicals

Industrial automation, control, and electromechanical components. Over 2 billion parts across 5,100+ manufacturers. Quotes back in 15 minutes, 24/7 — fulfilled from Anaheim, California.

Certifications

  • AS9120:2025
  • ISO 9001:2015
  • FAA AC 00-56B
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USA fulfillment. Every order shipped from our Anaheim, California operations. Counterfeit-mitigation aligned to SAE AS5553 / AS6081.

Official logos
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  • AS9120:2025
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